* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  background-color: #081620;
}
.container {
  background-color: #ffffff;
  width: 400px;
  margin: 0 auto;
  margin-top: 30px;
  /* 圆角 */
  border-radius: 10px;
  padding: 30px;
}
h1 {
  text-align: center;
  margin-bottom: 20px;
}
.form-item {
  width: 100%;
  margin-bottom: 15px;
}
.txt {
  outline: none;
  width: 100%;
  height: 30px;
  padding: 0 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 14px;
}
.txt:focus {
  border-color: #5f8be8;
}
select.txt {
    height:100px;
    padding: 10px;
}
textarea.txt{
    height: 100px;
    padding:10px;
    /* 不可拖拽 */
    resize:none;
}
button{
    height: 30px;
    width:150px;
    border-radius: 5px;
    background-color: #5f8be8;
    outline: none;
    border: none;
    color:#ffffff;
    font-size: 14px;
    cursor: pointer;
}
button:hover{
    background-color: #4a7be8;
}
/* 选用和禁用按钮 */
button:disabled{
    background-color: #cccccc;
    cursor: not-allowed;
}
.policy.span{
  vertical-align: 2px;
}